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#126 2012-07-21 05:26:56

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,673

Re: Fermi's questions!!!

Good. I will post more if I think of any.

Oh, here is one:

Q:"If a room 4x4x2 was filled with as much McDonald's hamburgers and a starving person somehow absorbed every single calorie out of it, would it be enough to have him run once around the Earth? If not, then what would be the smallest room filled with hamburgers that would enable him to do that?"


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#127 2012-08-26 07:10:25

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,799

Re: Fermi's questions!!!

It would depend on what you mean by running around the earth. A great circle?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#128 2012-08-26 07:12:40

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,673

Re: Fermi's questions!!!

Let's say- the equator.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#129 2012-08-26 07:34:34

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,799

Re: Fermi's questions!!!

4x4x2? Meters, inches, feet?

Wait, I asked that same question for the popcorn question. You answered in meters. Hold on calculation is coming...


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#130 2012-08-26 07:55:52

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,673

Re: Fermi's questions!!!

Meters.


“Here lies the reader who will never open this book. He is forever dead.

“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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#131 2012-08-26 09:08:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,799

Re: Fermi's questions!!!

A typical burger (quarter pounder ) of this type has a 4'' diameter bun. This can verified on the net and was standard from 2009. We round this to .1 m

20101014-aging-burger-2.jpg

We estimate its height at about .05m high and it is approximately cylindrical in shape. This burger then has a volume of .00078539 cubic meters.

The room has a volume of 32 m^3, so 40000 burgers (quarter pounders ) can be stuffed into the room. The caloric intake of one burger is 460 calories.

Now everyone on this planet and many others knows that you can walk briskly(4 mph ) for 20 minutes on 4 calories! So you can probably run for 5 minutes ( assuming a near linear relationship ) on 4 calories. Let's round this to 5 calories or 1 calorie provides 1 minute of running at say 12 mph.

We have a total calorie count of:

That is

of running at 12 mph.

So we can run around the earth approximately

147 times.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#132 2012-10-05 15:01:55

ryandm
Member
Registered: 2012-10-05
Posts: 1

Re: Fermi's questions!!!

What does General Sherman (a sequoia tree and the world's largest tree) weigh, measured in units of US dollar coins?


current project: www.fermiquestions.com

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#133 2013-04-19 20:13:54

Mrwhy
Member
Registered: 2012-07-02
Posts: 52

Re: Fermi's questions!!!

Avagadro number (6 times 10^23 maybe)
times
6 /22.4  vol of lung
times
1/N fraction-fill (1/4 maybe)
times
20% oxygen

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